Punch tool

ABSTRACT

A punch tool is mounted within a tubular portion of a toolcarrier by means of two separable half-shells which engage over the shank of the tool. The shells are retained within the toolcarrier by means of a pin extending transversely therethrough. The tool-carrier is reciprocable within a bore of a support member, and the pin has a head engaged in an axial groove in the bore.

United States Patent [191 Beauplat Aug. 27, 1974 PUNCH TOOL [76] Inventor: Philippe Louis Beauplat, 44 Rue de Montmorency, 95230 Montmorency, France 22 Filed: Dec. 26, 1973 21 Appl. No.: 428,012

[30] Foreign Application Priority Data Jan. 14, 1973 France 73.273

[52] US. Cl. 83/698 [51] Int. Cl B26d 1/00 [58] Field of Search 83/698 [56] References Cited UNITED STATES PATENTS 1,049,847 1/1913 Gist 33/698 3,535,967 10/1970 Whistler, Sr. et a]. 83/698 Primary Examiner-Willie G. Abercrombie Attorney, Agent, or Firm-Lewis H. Eslinger, Esq.;

Alvin Sinderbriand, Esq.

[ ABSTRACT A punch tool is mounted within a tubular portion of a tool-carrier by means of two separable half-shells which engage over the shank of the tool. The shells are retained within the tool-carrier by means of a pin extending transversely therethrough. The tool-carrier is reciprocable within a bore of a support member, and the pin has a head engaged in an axial groove in the bore.

4 Claims, 2 Drawing Figures "PUNCH TOOL FIELD OF THE INVENTION SUMMARY OF THE INVENTION According to the present invention, there is provided in combination, a support having a bore, said bore having a groove, a cylindrical tool-carrier slidable in said bore, said tool carrier including, a tubular portion, said tubular portion having an abutment surface, a punch tool, said punch tool including a shank, two seperable half-shells, Said half-shells engaging over the tool shank and fitting into the tubular portion for engagement with said abutment surface whereby to transmit impact force, the half-shells and the tubular portion having aligned radial holes located beyond the tool shank, and pin means extending through said aligned holes, said pin means including a projecting head, said head being engaged in said groove whereby to guide the toolcarrier in the bore.

BRIEF DESCRIPTION OF THE DRAWINGS An embodiment of the invention will now bedescribed, by way of example only, with reference to the accompanying diagrammatic drawings, in which:

FIG. I is an axial cross-section of a punch tool mounting arrangement; and

FIG. 2 is a perspective view, to an enlarged scale, showing two tool-mounting shells of the arrangement of FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT There is shown in the drawings a support in the form of a head plate I or goose-neck of a punching press, the support having at least one cylindrical bore which receives a slidable tool-carrier 3 of cylindrical form. One end portion of the tool-carrier 3 is shaped to receive the head of a ram or other impact-imparting element arranged to actuate same. Beyond the end portion 4, the tool-carrier 3 has a tubular clamping portion 5.

A punch tool 6 clamped within the clamping portion has a shank 7 profiled so as to form at least one axial retention element which may be projecting or hollow. In the embodiment illustrated, the tool shank 7 is cylindrical and has an annular groove 8 delimited at the opposite side to that of the working portion of the tool, by a flat shoulder or step 9. The tool-carrier 3 also comprises two semicylindrical shells l0 and 11 shaped internally to define patterns 12 and 13 of complementary shape to that of the tool shank 7. Within the patterns, there is provided an annular rib which engages, the groove 8 of the tool shank 7, and the patterns are positioned, without any play, within the tubular clamping portion 5. A pin 14 is inserted through aligned radial holes 15 to 17 in the clamping portion 5 and in the shells l0 and 11. The pin 14 has a projecting head 18 engaged in a groove 19 opening into the bore 2 topermit axial movement of the tool-carrier 3and tool 6 relative to the support 1 whilst preventing rotational movement therebetween.

In order to mount the tool 6 in the tool-carrier 3, the shells l0 and 11 are engaged over the tool shank 7, and,

when these are in mutual contact, they are inserted into the tubular clamping portion 5 of the tool-carrier 3, until they engage against the inner end of the clamping portion 5, after which the pin 14 is inserted into the holes 15 to 17 which have been placed in alignment. The tool-carrier 3 is then inserted into the bore 2, the head 18 of the pin 14 having been aligned with the groove 19 beforehand.

If the tool shank 7 and the shell patterns 13 and 14 are not bodies of revolution, the working portion of the tool 6 will be accurately located with respect to the support 1 andvconsequently with respect to the corresponding die. If, as in the embodiment illustrated, the tool shank 7 and the patterns 13 and 1.4 have a shape of a body of revolution, the same result is obtained by means of a projecting peg 20 rigid with the tool shank 7 and engaged in a notch or recess 21 in the shells.

In both cases, the positioning and replacement of the tool is performed in a convenient and rapid manner; moreover, the punching power is transmitted without danger of burring, since the tool shank 7 abuts against the bottom of the patterns 12, 13 and the shells themselves abut against the inner end of the tubular clamping portion 5 of the tool-carrier 3, play being provided between the holes l6, l7 and the pin 14 for this purpose.

In order to provide automatic lubrication for the cutting area of theme] 6, an annular groove 22 is provided on the internal surface of the clamping portion 5 and surrounds the shells l0 and 11. This groove is in permanent communication with a passage 23 opening in alignment with a jet( not shown) and fed by a lubricant distribution circuit, when the tool-carrier 3 is located in a standby position at the upper end of its stroke. The groove 22 is alsoin communication with at least one longitudinal passage formed by chamfers 24, 25 of the shells 10 and 11. The lubricant distributed thus flows through the. passage 23, the groove 22 and the passage formed by the chambers 24,, 25 until it reaches the cutting area of the tool 6.

The arrangement described is applicable tomagazine heads or turrets of punching and/or notching presses preferably of the automatic and programmed type, as well as to punching units.

What is claimed is: v

1. In combination a support having a bore, said bore having a groove a cylindrical tool-carrier slidable in said bore, said toolcarrier including a tubular portion, said tubular portion having an abutment surface,

a punch tool, said punch too] including,

a shank, v

two separable half-shells, said half-shells engaging over the tool shank and fitting into the tubular portion for engagement with said abutment surface whereby to transmit an impact force, the half-shells and the tubular portion having aligned radial-holes located beyond the tool shank, and

pin means extending through said aligned holes, said -pin means including a projecting head, said head being engaged insaid groove whereby to guide the tool-carrier in the bore.

2. The combination claimed in claim 1, whereinthe tool shank has an axial retaining groove, the innermost edge of said groove being defined by a shoulder, and an 4. The combination claimed in claim 1 wherein the tubular portion has an annular groove formed on its inner surface and encircling the shells, said tool-carrier I including,

means defining a passage, said passage communicating with said annular groove and being arranged to communicate with an outlet of a lubricant distribution circuit, and means defining a passage extending between said annular groove and the working zone of the tool.

. UNITED STATES PATENT. OFFICE CERTIFICATE OF CORRECTION Patent No. 3,831A83 Dated Augus 7, 97

Invent0r(s) Philippe Louis Beauplat It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

On the title page at item 30, change the foreign priority date from "Jan. 1 1, 1973" to -Jan. 1973--.

Signed and sealed this 3rd day of December 1974 (SEAL) Attest:

McCOY M. GIBSON JR. C. MARSHALL DANN f Attesting Officer Commissioner of Patents USCOMM-DC we're-Pea U-S. GOVERNMENT PRINTING OFFICE 19.9 0-3'6-33l,

I RM PO-105O (10-59) j I UNITED STATES PATENT OFFICE CERTIFICATE @F CORRECTION Pa ent NO. 3,83l, -l83 Dated August 27, 197A 'hwenun( Philione Louis Beauolat It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below: I

On the title page, at item 30, change the identification of the foreign priority application from "73.273" to Signed and sealed this 29th day of October 1974.

(SEAL) Attest:

McCOY M. GIBSON JR. C. MARSHALL DANN Attesting Officer Commissioner of Patents USCOMM-DC 60376-P69 R US. GOVERNMENT PFINTING OFFICE :15! O-3ll33l FORM PO-IOSO (10-69) 

1. In combination a support having a bore, said bore having a groove a cylindrical tool-carrier slidable in said bore, said toolcarrier including a tubular portion, said tubular portion having an abutment surface, a punch tool, said punch tool including, a shank, two separable half-shells, said half-shells engaging over the tool shank and fitting into the tubular portion for engagement with said abutment surface whereby to transmit an impact force, the half-shells and the tubular portion having aligned radial holes located beyond the tool shank, and pin means extending through said aligned holes, said pin means including a projecting head, said head being engaged in said groove whereby to guide the tool-carrier in the bore.
 2. The combination claimed in claim 1, wherein the tool shank has an axial retaining groove, the innermost edge of said groove being defined by a shoulder, and an annular projection is defined within the half-shells, said projection being engaged in said retaining groove.
 3. The combination claimed in claim 1 further comprising means for angularly locating the tool relative to the half-shells, said means comprising peg means rigid with the tool shank, each said half-shell including, a plane surface, the plane surfaces of the two half-shells being in contact, and seat means formed in said plane surfaces, said peg means being located in the seat means.
 4. The combination claimed in claim 1 wherein the tubular portion has an annular groove formed on its inner surface and encircling the shells, said tool-carrier including, means defining a passage, said passage communicating with said annular groove and being arranged to communicate with an outlet of a lubricant distribution circuit, and means defining a passage extending between said annular groove and the working zone of the tool. 